Indeed the cql 3.0 reference in cassandra11.pdf does not mention the dynamic tables whatsoever. Now I found the following posting:
http://www.datastax.com/support-forums/topic/flexible-schema-in-cql-3 where the moderator said " Yes, CQL 3 expects all columns to be defined in the metadata". At this point I am really confused about what direction Cassandra is going. CQL 3 has the benefit of composite keys, but no dynamic columns. I thought, the whole point of Cassandra was to provide dynamic tables. I need to have a huge table to store market quotes, and be able to query it by name and timestamp (t1 <= t <= t2), therefore I wanted the composite key. Loading data to such table using prepared statements (CQL 3-based) was very slow, because it makes a server call for each row. So I looked at the API way of doing it, using batch_mutate. Unfortunately, it seems that batch_mutate would not support composite key. Then I thought of making wide rows, so I store many quotes in one row (few thousand). For this I really need dynamic table. I would appreciate any useful suggestion. -----Original Message----- From: Leonid Ilyevsky [mailto:lilyev...@mooncapital.com] Sent: Friday, July 06, 2012 4:16 PM To: user@cassandra.apache.org Subject: RE: Dynamic CF Thanks Jeremy, but this doesn't work for me. I am using cql3, because I need new features like composite keys. The manual you pointed to is for 2.0. I have suspicion that cql3 does not support dynamic tables at all. Is there a manual for cql3? -----Original Message----- From: Jeremy Hanna [mailto:jeremy.hanna1...@gmail.com] Sent: Friday, July 06, 2012 4:06 PM To: user@cassandra.apache.org Subject: Re: Dynamic CF you can use the cqlsh help but it will eventually refer you to a cql reference such as this one that says what the options are. Looks like you need just 'default_validation'. http://www.datastax.com/docs/1.0/references/cql/index#cql-column-family-storage-parameters On Jul 6, 2012, at 2:13 PM, Leonid Ilyevsky wrote: > Can I create a dynamic Cf using cql3? What is the syntax? > > Here is what I tried: > > > cqlsh:test> create table mytest ( > ... asset ascii, datetime int, count int, primary key(asset, > datetime) ) > ... with default_validation_class = double; > Bad Request: default_validation_class is not a valid keyword argument for > CREATE TABLE > > This email, along with any attachments, is confidential and may be legally > privileged or otherwise protected from disclosure. Any unauthorized > dissemination, copying or use of the contents of this email is strictly > prohibited and may be in violation of law. If you are not the intended > recipient, any disclosure, copying, forwarding or distribution of this email > is strictly prohibited and this email and any attachments should be deleted > immediately. This email and any attachments do not constitute an offer to > sell or a solicitation of an offer to purchase any interest in any investment > vehicle sponsored by Moon Capital Management LP ("Moon Capital"). 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